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Finding the Fourth Proportional to 8,409.88, 12,615.43 and 2,860.98

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Solution

The fourth proportional to 8,409.88, 12,615.43 and 2,860.98 is: 4,291.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,409.88 : 12,615.43 = 2,860.98 : x
  2. Step 2: Convert to fraction form
    8,409.88/12,615.43 = 2,860.98/x
  3. Step 3: Cross multiply
    8,409.88x = 12,615.43 × 2,860.98
  4. Step 4: Simplify right side
    8,409.88x = 36,092,492.92
  5. Step 5: Solve for x
    x = 36,092,492.92/8,409.88
  6. Step 6: Final answer
    x = 4,291.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.